CN201322753Y - Rotating-speed measuring device - Google Patents
Rotating-speed measuring device Download PDFInfo
- Publication number
- CN201322753Y CN201322753Y CNU2008202127651U CN200820212765U CN201322753Y CN 201322753 Y CN201322753 Y CN 201322753Y CN U2008202127651 U CNU2008202127651 U CN U2008202127651U CN 200820212765 U CN200820212765 U CN 200820212765U CN 201322753 Y CN201322753 Y CN 201322753Y
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- control module
- display unit
- unit
- resistance
- measuring device
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Abstract
The utility model provides a rotating-speed measuring device, which comprises a sampling unit, a control unit and a display unit that are orderly connected, wherein the rotating-speed sampling unit collects rotating-speed signals and outputs pulse signals to the input end of the control unit; the control unit outputs data signals to the display unit after calculation; the display unit displays rotating-speed values. With simple structure, the utility model can be used conveniently, show rotating-speed data visually, and improve the working efficiency of technical personnel.
Description
Technical field
The utility model relates to the tachometric survey technology, relates more specifically to the rotation-speed measuring device of electric motor car fan.
Background technology
At present, the application of electric automobile is very general, because with respect to general-utility car, electric automobile does not pollute and can energy savings, so be subjected to very much consumer's welcome.Air-conditioning system and fan are requisite parts in the electric motor car, the quality of fan will determine the quality of electric motor car serviceability, when being installed in fan on the electric vehicle, need to detect the quality of fan, for guaranteeing the quality of fan, need accurately measure the rotating speed of fan, whether meet the demands with the performance parameter that detects fan, at present also do not have a kind of simple and effective experimental provision accurately to measure the rotating speed of fan, this brings inconvenience for technician's debugging work.
The utility model content
The utility model is at lacking necessary pick-up unit in the prior art, thereby can not the rotating speed of fan be carried out accurately, detect intuitively, the problem of making troubles for technician's test job, a kind of rotation-speed measuring device is provided, gather tach signal by the signals collecting mouth, after handling through control module rotating speed is presented on the display unit.
The utility model provides a kind of rotation-speed measuring device, this device comprises sampling unit, control module and the display unit that connects successively, described sampling apparatus is gathered tach signal, and output pulse signal is to the input end of control module, described control module is through calculating outputting data signals to display unit, and described display unit shows tachometer value.
Use device provided by the utility model to comprise sampling unit, control module and the display unit that connects successively, gather tach signal by sampling unit, show rotating speed through the control module processing and by display unit, the utility model is simple in structure, easy to use, demonstration rotary speed data that can be accurate and visual has improved technician's work efficiency.
Description of drawings
Fig. 1 is the theory diagram of the rotation-speed measuring device of the utility model embodiment;
Fig. 2 is the circuit diagram of the sampling unit of rotation-speed measuring device in the utility model embodiment;
Fig. 3 is the circuit diagram of control module of the rotation-speed measuring device of the utility model embodiment;
Fig. 4 is the circuit diagram of display unit of the rotation-speed measuring device of the utility model embodiment;
Fig. 5 is the circuit diagram of power supply unit of the rotation-speed measuring device of the utility model embodiment;
Fig. 6 is the circuit diagram of the rotation-speed measuring device push-button unit reset circuit of the utility model embodiment;
Fig. 7 is the circuit diagram that the rotation-speed measuring device push-button unit of the utility model embodiment suspends circuit;
Fig. 8 is the circuit diagram of the rotation-speed measuring device push-button unit clear circuit of the utility model embodiment;
Fig. 9 is the Appearance Panel front view of the rotation-speed measuring device of the utility model embodiment.
Embodiment
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
The utility model rotation-speed measuring device as shown in Figure 1, this device comprises sampling unit 1, control module 2 and the display unit 3 that connects successively, described sampling unit 1 is gathered tach signal, and output pulse signal is to the input end of control module 2, described control module 2 is through calculating outputting data signals to display unit 3, and described display unit 3 shows tachometer value.
As shown in Figure 2, described sampling unit 1 comprises the signals collecting mouth, described signals collecting mouth comprises three input ends, input end 3 input 12V supply voltages, input end 2 is gathered input signal, and input end 1 is connected with ground, and described sampling unit also comprises resistance R 13, capacitor C 8, capacitor C 12 and comparer U4, one end of described resistance R 13 connects the input end 2 of signals collecting mouth, and the other end connects the input end in the same way 3 of comparer U4; Resistance R 12 1 ends input 5VCC supply voltage, the other end connects the input end 2 of signals collecting mouth; One end of resistance R 15 connects the input end in the same way 3 of comparer U4, and the other end is connected with ground; One end of capacitor C 8 connects the input end in the same way 3 of comparer U4, and the other end is connected with ground; One termination 5VCC supply voltage of capacitor C 12, other end ground connection; The power input 8 of comparer U4 connects the 5VCC supply voltage, and its reverse input end 2 is connected with output terminal 1, and another output terminal 4 of comparer U4 is connected with ground.Described sampling unit also comprises buffer circuit, and described buffer circuit comprises optocoupler, resistance R 10, resistance R 11, resistance R 14, and wherein resistance R 10 1 ends connect 5VCC supply voltage, the input end 1 of another termination optocoupler; Resistance R 11 1 ends connect 5VCC supply voltage, the output terminal 3 of another termination optocoupler; Resistance R 14 1 ends connect the output terminal 4 of optocoupler, and the other end is connected with ground, and the output terminal 3 of optocoupler is connected with controller.Described sampling unit mainly is that the 3 pairs of fans of input end by the signals collecting mouth provide a 12V working power, and the pulse that fan produces come in by input end 2 samplings of signals collecting mouth, pass through R13, R15 and C8 decay and filtering to sampled signal, sampled signal is input among the comparer U4, comparer U4 act as voltage follow, play anti-interference effect, sampled signal is input among the optocoupler U2 then, input signal is isolated, can strengthen the anti-interference of single-chip microcomputer, then signal be given control module 2.
As shown in Figure 3, described control module 2 is a single-chip microcomputer, and the model of described single-chip microcomputer is PIC18F258, and described sampling unit is input to signal at the middle fracture RB2 end of single-chip microcomputer, the pulse signal that described single-chip microcomputer is come in to sampling is handled, and by display unit data presentation is come out.
As shown in Figure 4, described display unit 3 comprises gating chip and charactron display chip, described gating chip is preferably 74HC595, the port SER of described gating chip, RCLK and SRCLK respectively with the RC5/SDO of described single-chip microcomputer, RC2/CCP1 links to each other with the RC3/SCK/SCL port, described digital display chip is preferably LG5641BH, port A～the H of described digital display chip distinguishes corresponding connection with port QA～QH of gating chip 74HC595, described digital display chip LG5641BH interconnects by driving circuit and single-chip microcomputer, comprise four driving circuits, first driving circuit comprises resistance R 16, resistance R 20 and triode Q1, described resistance R 20 1 ends connect the RA0 port of single-chip microcomputer, the other end connects the base stage of triode Q1, the collector of described triode Q1 connects resistance R 16, the other end of resistance R 16 connects the 5VCC supply voltage, and the emission collection of described triode Q1 is connected with the DIG4 port of charactron; Second driving circuit comprises resistance R 17, resistance R 21 and triode Q2, described resistance R 21 1 ends connect the RA1 port of single-chip microcomputer, the other end connects the base stage of triode Q2, the collector of described triode Q2 connects resistance R 17, the other end of resistance R 17 connects the 5VCC supply voltage, and the emission collection of described triode Q2 is connected with the DIG3 port of charactron; The 3rd driving circuit comprises resistance R 18, resistance R 22 and triode Q3, described resistance R 22 1 ends connect the RA2 port of single-chip microcomputer, the other end connects the base stage of triode Q3, the collector of described triode Q3 connects resistance R 18, the other end of resistance R 18 connects the 5VCC supply voltage, and the emission collection of described triode Q3 is connected with the DIG2 port of charactron; The moving circuit of 4 wheel driven comprises resistance R 19, resistance R 23 and triode Q4, described resistance R 23 1 ends connect the RA3 port of single-chip microcomputer, the other end connects the base stage of triode Q4, the collector of described triode Q4 connects resistance R 19, the other end of resistance R 19 connects the 5VCC supply voltage, the emission collection of described triode Q4 is connected with the DIG3 port of charactron, described display unit display mode is a dynamic scan, Q1, Q2, Q3, the Q4 triode is that driving tube is selected in the position of four charactrons, amplify anode current altogether by electric current, workflow is: single-chip microcomputer sends wants data presented, send to gating chip 74HC595, described then single-chip microcomputer is determined bit data, passes through RA0, RA1, RA2, RA3 carries out a gating, through Q1, Q2, Q3, the Q4 triode flows to LED group of four figures pipe after amplifying.
Described rotation-speed measuring device also comprises push-button unit 4, described push-button unit and described control module logotype are mutually controlled described display unit, described push-button unit 4 comprises reset circuit, the output terminal of described reset circuit links to each other with the control end of control module and is used to make the numerical value of described display unit to reset, as shown in Figure 6, described reset circuit comprises diode D2, resistance R 3, resistance R 5, electrochemical capacitor C4 and reset switch S3, the negative electrode of diode D2 connects the 5VCC supply voltage, anode connects the end of reset switch S3, the other end of reset switch S3 links to each other with ground, one end of resistance R 3 connects the 5VCC supply voltage, the other end connects the anode tap of diode, the anode of electrochemical capacitor C4 connects the anode tap of diode, and negative electrode is connected with ground; One end of resistance R 5 connects the anode tap of diode, and the other end connects the MCLR port of controller, and when reset switch S3 pressed, the MCLR port of controller became low level, and the demonstration of controller control this moment charactron resets.Described push-button unit also comprises the time-out circuit, the output terminal of described time-out circuit links to each other with the control end of control module and is used to make described display unit to show current numerical value, as shown in Figure 7, described time-out circuit comprises resistance R 1, resistance R 6, resistance R 8, capacitor C 6, one end of resistance R 1 connects the 5VCC supply voltage, the other end connects the end of reset switch S1, the other end of reset switch S1 connects resistance R 6 and resistance R 8 simultaneously, the other end of resistance R 8 is connected with ground, the other end of resistance R 6 connects an end of capacitor C 6, the RB0 port that connects controller simultaneously, the other end of capacitor C 6 is connected with ground, after pause switch was pressed, the RB0 port of controller became high level, and controller control this moment total system is suspended.Described push-button unit also comprises clear circuit, the output terminal of described clear circuit links to each other with the control end of control module and is used to make described display unit to be shown as zero, as shown in Figure 8, described clear circuit comprises resistance R 2, resistance R 7, resistance R 9, capacitor C 5, one end of resistance R 2 connects the 5VCC supply voltage, the other end connects the end of reset switch S2, the other end of reset switch S2 connects resistance R 7 and resistance R 9 simultaneously, the other end of resistance R 9 is connected with ground, the other end of resistance R 7 connects an end of capacitor C 5, the RB3 port that connects controller simultaneously, the other end of capacitor C 5 is connected with ground, after pause switch was pressed, the RB3 port of controller became high level, the zero clearing of controller control this moment total system.
As shown in Figure 5, described power supply unit 5 comprises power module L78M05CP, electrochemical capacitor C1, electrochemical capacitor C2, capacitor C 3, resistance R 4 and LED 0, described power module L78M05CP earth terminal is connected with ground, described power module L78M05CP input end connects the signals collecting mouth, signals collecting mouth input end 1 connects power switch, the input end 2 of signals collecting mouth connects voltage regulator, power module L78M05CP input end connects the anode tap of electrochemical capacitor C1, the cathode terminal of electrochemical capacitor C1 is connected with ground, power module L78M05CP output terminal connects the anode tap of electrochemical capacitor C2, the cathode terminal of electrochemical capacitor C2 is connected with ground, one end of capacitor C 3 connects power module L78M05CP output terminal, the other end is connected with ground, described power module L78M05CP output terminal also connects resistance R 4, the other end of resistance R 4 connects the negative electrode of LED 0, the anode of LED 0 is connected with ground, when described power module is described sampling unit, when described control module and the power supply of described display unit, described LED 0 brightens.
Fig. 9 is the outward appearance front view of the rotation-speed measuring device of the utility model embodiment, as we can see from the figure, this device also comprises shell, described sampling unit 1, control module 2, display unit 3, push-button unit and power supply unit 5 place in the described shell, described shell is used plastic production usually, safe and reliable, thus can guarantee that inner circuit is not damaged.
Described rotation-speed measuring device also comprises tachometer gage display, voltage table display and power light, the LED group of four figures pipe that described tachometer gage display is described display unit, be used to show the rotating speed of measurement, described voltage table display is used to show the load voltage value of current power supply unit input, and described power light is used to show whether current power supply is connected.
Described rotation-speed measuring device also comprises ground connection mouth, signal input and power output, the common ground end that described ground connection mouth is described rotation-speed measuring device and tested device, described power output is that described rotation-speed measuring device is the tested device out-put supply, and described signal input is for measuring the signal input part of described tested device.
Described rotation-speed measuring device also comprises power switch, reset switch, pause switch and voltage-regulation switch, after plugging the 220V AC power, turns on the power switch, and power light is bright; Described reset switch is used for to system reset, presses the then system's work that starts anew of reset switch button; Described pause button is used for suspending the data on the tachometer gage display, and when tested device was worked, data constantly added up, and can suspend data in the time of will seeing data this moment; Described voltage-regulation switch is used to regulate the magnitude of voltage of described rotation-speed measuring device output.
Be example with the rotation speed of the fan of measuring in the electric motor car below, describe the course of work of the utility model rotation-speed measuring device in detail, the step during operation is as follows:
1, plug the 220V AC Power supply socket, turn on the power switch, power light brightens, and tachometer gage is shown as 0, and the regulation voltage by-pass cock makes voltage table be shown as 12V.
2, the red line (power lead) of the fan of needs detection is connected on the 12V power output of frock, black line (ground wire) connects frock ground mouth, and yellow line (output line) connects the signal input of frock.
3, press reset button, rotating speed is to add up for 1 second, full 1 minute of meter, and data are dodged three times, change the rotating speed of next minute over to.
4, when supply voltage is 12V, measuring in the fan one-period is two pulses, and then rotating speed is half of measured value.
5, according to fan specifications and models and examination criteria, when the rotation speed of the fan of measuring was 3600 commentaries on classics, fan was qualified, otherwise is underproof fan.
The above is enforcement of the present utility model only, is not to be used to limit protection domain of the present utility model.All any modifications of being done within spirit of the present utility model and principle, replacement, improvement etc. all are included in the protection domain of the present utility model.
Claims (8)
1, a kind of rotation-speed measuring device, it is characterized in that: this device comprises sampling unit, control module and the display unit that connects successively, described sampling unit is gathered tach signal, and output pulse signal is to the input end of control module, described control module is through calculating outputting data signals to described display unit, and described display unit shows tachometer value.
2, device according to claim 1 is characterized in that: described rotation-speed measuring device also comprises power supply unit, and described power supply unit links to each other with described sampling unit, described control module and described display unit respectively.
3, device according to claim 1 is characterized in that: described rotation-speed measuring device also comprises push-button unit, and described push-button unit links to each other with described control module and is used to control described display unit.
4, device according to claim 3 is characterized in that: described push-button unit comprises reset circuit, and the output terminal of described reset circuit links to each other with the control end of control module and is used to make the numerical value of described display unit to reset.
5, device according to claim 3 is characterized in that: described push-button unit also comprises the time-out circuit, and the output terminal of described time-out circuit links to each other with the control end of control module and is used to make described display unit to show current tachometer value.
6, device according to claim 3 is characterized in that: described push-button unit also comprises clear circuit, and the output terminal of described clear circuit links to each other with the control end of control module and is used to make described display unit to be shown as zero.
7, device according to claim 1 is characterized in that: described control module is a single-chip microcomputer.
8, device according to claim 1 is characterized in that: described sampling unit also comprises optical coupling isolation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202127651U CN201322753Y (en) | 2008-10-24 | 2008-10-24 | Rotating-speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202127651U CN201322753Y (en) | 2008-10-24 | 2008-10-24 | Rotating-speed measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN201322753Y true CN201322753Y (en) | 2009-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202127651U Expired - Lifetime CN201322753Y (en) | 2008-10-24 | 2008-10-24 | Rotating-speed measuring device |
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| CN (1) | CN201322753Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854328A (en) * | 2011-06-28 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Rotating speed testing device of fan |
| CN101782590B (en) * | 2009-11-27 | 2013-06-05 | 艾默生网络能源有限公司 | Method and system for detecting fan fault of electric and electronic products |
| CN104635544A (en) * | 2015-02-05 | 2015-05-20 | 南宁市神华振动时效技术研究所 | Vibration aging controller |
| CN111751567A (en) * | 2019-03-28 | 2020-10-09 | 比亚迪股份有限公司 | Rotational speed detection device and vehicle |
-
2008
- 2008-10-24 CN CNU2008202127651U patent/CN201322753Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782590B (en) * | 2009-11-27 | 2013-06-05 | 艾默生网络能源有限公司 | Method and system for detecting fan fault of electric and electronic products |
| CN102854328A (en) * | 2011-06-28 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Rotating speed testing device of fan |
| CN104635544A (en) * | 2015-02-05 | 2015-05-20 | 南宁市神华振动时效技术研究所 | Vibration aging controller |
| CN104635544B (en) * | 2015-02-05 | 2019-03-29 | 南宁市神华振动时效技术研究所 | Vibration aging controller |
| CN111751567A (en) * | 2019-03-28 | 2020-10-09 | 比亚迪股份有限公司 | Rotational speed detection device and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |
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| CX01 | Expiry of patent term |